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Finding the Fourth Proportional to 659,888.88, 910,636.92 and 387,987.36

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Solution

The fourth proportional to 659,888.88, 910,636.92 and 387,987.36 is: 535,416.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,888.88 : 910,636.92 = 387,987.36 : x
  2. Step 2: Convert to fraction form
    659,888.88/910,636.92 = 387,987.36/x
  3. Step 3: Cross multiply
    659,888.88x = 910,636.92 × 387,987.36
  4. Step 4: Simplify right side
    659,888.88x = 353,315,614,509.33
  5. Step 5: Solve for x
    x = 353,315,614,509.33/659,888.88
  6. Step 6: Final answer
    x = 535,416.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.